Borate coinitiators for photopolymerization

US6210863A · kind A · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Allan F. Cunningham · Somers, US
• Martin Kunz · Weil am Rhein, DE
• Hisatoshi Kura · Takarazuka, JP

Key dates

• Filing date: May 19, 1999
• Grant date: Apr 3, 2001
• Expiry date: May 19, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/117
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Compounds of the formula I or I' ##STR1## in which R.sub.1 and R.sub.2 independently of one another, for example, are an aromatic hydrocarbon, with the proviso that the aromatic hydrocarbon radical is substituted in at least one o-position, or R.sub.1 and R.sub.2, for example, independently of one another are C.sub.1 -C.sub.20 alkyl, which is substituted by R.sub.9 R.sub.10 R.sub.11 Si; R.sub.2a is, for example, a divalent aromatic hydrocarbon radical; R.sub.3 is C.sub.1 -C.sub.20 alkyl which is substituted by R.sub.9 R.sub.10 R.sub.11 Si or is an aromatic hydrocarbon; R.sub.4 is, for example, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.12 cycloalkyl or phenyl-C.sub.1 -C.sub.6 alkyl; E is R.sub.14 R.sub.15 R.sub.16 P or R.sub.8 R.sub.8a R.sub.7 N; R.sub.7, R.sub.8 and R.sub.8a and R.sub.9, R.sub.10 and R.sub.11 independently of one another are, for example, C.sub.1 -C.sub.12 alkyl; R.sub.14, R.sub.15 and R.sub.16 independently of one another are substituted phenyl and G is a radical which is able to form positive ions, with the proviso that, if R.sub.1, R.sub.2 and R.sub.3 are 2,4,6-trimethylphenyl, R.sub.4 is not C.sub.2 -C.sub.20 alkyl or C.sub.2 -C.sub.8 alkenyl, are suitable for us…